Immunopathology Physician in Massachusetts
2 NPPES records list immunopathology physician with a practice address in Massachusetts, 0 per 100,000 residents, the 6th highest rate of 16; each record links to the provider's NPI and the Massachusetts license search.
Boston has the most, 2
Immunopathology Physician records in Massachusetts
- Harvey Cantor, M.D.Boston, MA 021151760513857
- Rex Smith, MD PHDBoston, MA 021141801870910
Source: CMS NPPES, primary taxonomy 207ZI0100X: records by practice city and the list of records, file of Aug 9, 2026.
Massachusetts ranks 6 of 16 per resident
Source: CMS NPPES, primary taxonomy 207ZI0100X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.
What the count covers
2 NPPES records list immunopathology physician (207ZI0100X) as their primary taxonomy with a practice address in Massachusetts: 0 per 100,000 residents against 0 nationally (50 states and D.C.). Boston has 2 of them (100%).
A record is a registration a provider made and keeps up to date: it shows neither that the provider is licensed nor that they still practice there. The state's own license search is the check.
The largest states
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.